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usb: cdc-acm: stop dropping tx buffers
[linux-2.6/kvm.git] / drivers / usb / gadget / rndis.c
blob7228e856223626dab7e568eb0f1252391758a95b
1 /*
2 * RNDIS MSG parser
3 *
4 * Authors: Benedikt Spranger, Pengutronix
5 * Robert Schwebel, Pengutronix
6 *
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * version 2, as published by the Free Software Foundation.
10 *
11 * This software was originally developed in conformance with
12 * Microsoft's Remote NDIS Specification License Agreement.
13 *
14 * 03/12/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
15 * Fixed message length bug in init_response
16 *
17 * 03/25/2004 Kai-Uwe Bloem <linux-development@auerswald.de>
18 * Fixed rndis_rm_hdr length bug.
19 *
20 * Copyright (C) 2004 by David Brownell
21 * updates to merge with Linux 2.6, better match RNDIS spec
22 */
23
24 #include <linux/module.h>
25 #include <linux/moduleparam.h>
26 #include <linux/kernel.h>
27 #include <linux/errno.h>
28 #include <linux/init.h>
29 #include <linux/list.h>
30 #include <linux/proc_fs.h>
31 #include <linux/seq_file.h>
32 #include <linux/netdevice.h>
33
34 #include <asm/io.h>
35 #include <asm/byteorder.h>
36 #include <asm/system.h>
37 #include <asm/unaligned.h>
38
39
40 #undef VERBOSE_DEBUG
41
42 #include "rndis.h"
43
44
45 /* The driver for your USB chip needs to support ep0 OUT to work with
46 * RNDIS, plus all three CDC Ethernet endpoints (interrupt not optional).
47 *
48 * Windows hosts need an INF file like Documentation/usb/linux.inf
49 * and will be happier if you provide the host_addr module parameter.
50 */
51
52 #if 0
53 static int rndis_debug = 0;
54 module_param (rndis_debug, int, 0);
55 MODULE_PARM_DESC (rndis_debug, "enable debugging");
56 #else
57 #define rndis_debug 0
58 #endif
59
60 #define DBG(str,args...) do { \
61 if (rndis_debug) \
62 pr_debug(str , ## args); \
63 } while (0)
64
65 #define RNDIS_MAX_CONFIGS 1
66
67
68 static rndis_params rndis_per_dev_params [RNDIS_MAX_CONFIGS];
69
70 /* Driver Version */
71 static const __le32 rndis_driver_version = __constant_cpu_to_le32 (1);
72
73 /* Function Prototypes */
74 static rndis_resp_t *rndis_add_response (int configNr, u32 length);
75
76
77 /* supported OIDs */
78 static const u32 oid_supported_list [] =
79 {
80 /* the general stuff */
81 OID_GEN_SUPPORTED_LIST,
82 OID_GEN_HARDWARE_STATUS,
83 OID_GEN_MEDIA_SUPPORTED,
84 OID_GEN_MEDIA_IN_USE,
85 OID_GEN_MAXIMUM_FRAME_SIZE,
86 OID_GEN_LINK_SPEED,
87 OID_GEN_TRANSMIT_BLOCK_SIZE,
88 OID_GEN_RECEIVE_BLOCK_SIZE,
89 OID_GEN_VENDOR_ID,
90 OID_GEN_VENDOR_DESCRIPTION,
91 OID_GEN_VENDOR_DRIVER_VERSION,
92 OID_GEN_CURRENT_PACKET_FILTER,
93 OID_GEN_MAXIMUM_TOTAL_SIZE,
94 OID_GEN_MEDIA_CONNECT_STATUS,
95 OID_GEN_PHYSICAL_MEDIUM,
96
97 /* the statistical stuff */
98 OID_GEN_XMIT_OK,
99 OID_GEN_RCV_OK,
100 OID_GEN_XMIT_ERROR,
101 OID_GEN_RCV_ERROR,
102 OID_GEN_RCV_NO_BUFFER,
103 #ifdef RNDIS_OPTIONAL_STATS
104 OID_GEN_DIRECTED_BYTES_XMIT,
105 OID_GEN_DIRECTED_FRAMES_XMIT,
106 OID_GEN_MULTICAST_BYTES_XMIT,
107 OID_GEN_MULTICAST_FRAMES_XMIT,
108 OID_GEN_BROADCAST_BYTES_XMIT,
109 OID_GEN_BROADCAST_FRAMES_XMIT,
110 OID_GEN_DIRECTED_BYTES_RCV,
111 OID_GEN_DIRECTED_FRAMES_RCV,
112 OID_GEN_MULTICAST_BYTES_RCV,
113 OID_GEN_MULTICAST_FRAMES_RCV,
114 OID_GEN_BROADCAST_BYTES_RCV,
115 OID_GEN_BROADCAST_FRAMES_RCV,
116 OID_GEN_RCV_CRC_ERROR,
117 OID_GEN_TRANSMIT_QUEUE_LENGTH,
118 #endif /* RNDIS_OPTIONAL_STATS */
119
120 /* mandatory 802.3 */
121 /* the general stuff */
122 OID_802_3_PERMANENT_ADDRESS,
123 OID_802_3_CURRENT_ADDRESS,
124 OID_802_3_MULTICAST_LIST,
125 OID_802_3_MAC_OPTIONS,
126 OID_802_3_MAXIMUM_LIST_SIZE,
127
128 /* the statistical stuff */
129 OID_802_3_RCV_ERROR_ALIGNMENT,
130 OID_802_3_XMIT_ONE_COLLISION,
131 OID_802_3_XMIT_MORE_COLLISIONS,
132 #ifdef RNDIS_OPTIONAL_STATS
133 OID_802_3_XMIT_DEFERRED,
134 OID_802_3_XMIT_MAX_COLLISIONS,
135 OID_802_3_RCV_OVERRUN,
136 OID_802_3_XMIT_UNDERRUN,
137 OID_802_3_XMIT_HEARTBEAT_FAILURE,
138 OID_802_3_XMIT_TIMES_CRS_LOST,
139 OID_802_3_XMIT_LATE_COLLISIONS,
140 #endif /* RNDIS_OPTIONAL_STATS */
141
142 #ifdef RNDIS_PM
143 /* PM and wakeup are "mandatory" for USB, but the RNDIS specs
144 * don't say what they mean ... and the NDIS specs are often
145 * confusing and/or ambiguous in this context. (That is, more
146 * so than their specs for the other OIDs.)
147 *
148 * FIXME someone who knows what these should do, please
149 * implement them!
150 */
151
152 /* power management */
153 OID_PNP_CAPABILITIES,
154 OID_PNP_QUERY_POWER,
155 OID_PNP_SET_POWER,
156
157 #ifdef RNDIS_WAKEUP
158 /* wake up host */
159 OID_PNP_ENABLE_WAKE_UP,
160 OID_PNP_ADD_WAKE_UP_PATTERN,
161 OID_PNP_REMOVE_WAKE_UP_PATTERN,
162 #endif /* RNDIS_WAKEUP */
163 #endif /* RNDIS_PM */
164 };
165
166
167 /* NDIS Functions */
168 static int
169 gen_ndis_query_resp (int configNr, u32 OID, u8 *buf, unsigned buf_len,
170 rndis_resp_t *r)
171 {
172 int retval = -ENOTSUPP;
173 u32 length = 4; /* usually */
174 __le32 *outbuf;
175 int i, count;
176 rndis_query_cmplt_type *resp;
177 struct net_device *net;
178 struct net_device_stats *stats;
179
180 if (!r) return -ENOMEM;
181 resp = (rndis_query_cmplt_type *) r->buf;
182
183 if (!resp) return -ENOMEM;
184
185 if (buf_len && rndis_debug > 1) {
186 DBG("query OID %08x value, len %d:\n", OID, buf_len);
187 for (i = 0; i < buf_len; i += 16) {
188 DBG("%03d: %08x %08x %08x %08x\n", i,
189 get_unaligned_le32(&buf[i]),
190 get_unaligned_le32(&buf[i + 4]),
191 get_unaligned_le32(&buf[i + 8]),
192 get_unaligned_le32(&buf[i + 12]));
193 }
194 }
195
196 /* response goes here, right after the header */
197 outbuf = (__le32 *) &resp[1];
198 resp->InformationBufferOffset = __constant_cpu_to_le32 (16);
199
200 net = rndis_per_dev_params[configNr].dev;
201 if (net->get_stats)
202 stats = net->get_stats(net);
203 else
204 stats = NULL;
205
206 switch (OID) {
207
208 /* general oids (table 4-1) */
209
210 /* mandatory */
211 case OID_GEN_SUPPORTED_LIST:
212 DBG("%s: OID_GEN_SUPPORTED_LIST\n", __func__);
213 length = sizeof (oid_supported_list);
214 count = length / sizeof (u32);
215 for (i = 0; i < count; i++)
216 outbuf[i] = cpu_to_le32 (oid_supported_list[i]);
217 retval = 0;
218 break;
219
220 /* mandatory */
221 case OID_GEN_HARDWARE_STATUS:
222 DBG("%s: OID_GEN_HARDWARE_STATUS\n", __func__);
223 /* Bogus question!
224 * Hardware must be ready to receive high level protocols.
225 * BTW:
226 * reddite ergo quae sunt Caesaris Caesari
227 * et quae sunt Dei Deo!
228 */
229 *outbuf = __constant_cpu_to_le32 (0);
230 retval = 0;
231 break;
232
233 /* mandatory */
234 case OID_GEN_MEDIA_SUPPORTED:
235 DBG("%s: OID_GEN_MEDIA_SUPPORTED\n", __func__);
236 *outbuf = cpu_to_le32 (rndis_per_dev_params [configNr].medium);
237 retval = 0;
238 break;
239
240 /* mandatory */
241 case OID_GEN_MEDIA_IN_USE:
242 DBG("%s: OID_GEN_MEDIA_IN_USE\n", __func__);
243 /* one medium, one transport... (maybe you do it better) */
244 *outbuf = cpu_to_le32 (rndis_per_dev_params [configNr].medium);
245 retval = 0;
246 break;
247
248 /* mandatory */
249 case OID_GEN_MAXIMUM_FRAME_SIZE:
250 DBG("%s: OID_GEN_MAXIMUM_FRAME_SIZE\n", __func__);
251 if (rndis_per_dev_params [configNr].dev) {
252 *outbuf = cpu_to_le32 (
253 rndis_per_dev_params [configNr].dev->mtu);
254 retval = 0;
255 }
256 break;
257
258 /* mandatory */
259 case OID_GEN_LINK_SPEED:
260 if (rndis_debug > 1)
261 DBG("%s: OID_GEN_LINK_SPEED\n", __func__);
262 if (rndis_per_dev_params [configNr].media_state
263 == NDIS_MEDIA_STATE_DISCONNECTED)
264 *outbuf = __constant_cpu_to_le32 (0);
265 else
266 *outbuf = cpu_to_le32 (
267 rndis_per_dev_params [configNr].speed);
268 retval = 0;
269 break;
270
271 /* mandatory */
272 case OID_GEN_TRANSMIT_BLOCK_SIZE:
273 DBG("%s: OID_GEN_TRANSMIT_BLOCK_SIZE\n", __func__);
274 if (rndis_per_dev_params [configNr].dev) {
275 *outbuf = cpu_to_le32 (
276 rndis_per_dev_params [configNr].dev->mtu);
277 retval = 0;
278 }
279 break;
280
281 /* mandatory */
282 case OID_GEN_RECEIVE_BLOCK_SIZE:
283 DBG("%s: OID_GEN_RECEIVE_BLOCK_SIZE\n", __func__);
284 if (rndis_per_dev_params [configNr].dev) {
285 *outbuf = cpu_to_le32 (
286 rndis_per_dev_params [configNr].dev->mtu);
287 retval = 0;
288 }
289 break;
290
291 /* mandatory */
292 case OID_GEN_VENDOR_ID:
293 DBG("%s: OID_GEN_VENDOR_ID\n", __func__);
294 *outbuf = cpu_to_le32 (
295 rndis_per_dev_params [configNr].vendorID);
296 retval = 0;
297 break;
298
299 /* mandatory */
300 case OID_GEN_VENDOR_DESCRIPTION:
301 DBG("%s: OID_GEN_VENDOR_DESCRIPTION\n", __func__);
302 length = strlen (rndis_per_dev_params [configNr].vendorDescr);
303 memcpy (outbuf,
304 rndis_per_dev_params [configNr].vendorDescr, length);
305 retval = 0;
306 break;
307
308 case OID_GEN_VENDOR_DRIVER_VERSION:
309 DBG("%s: OID_GEN_VENDOR_DRIVER_VERSION\n", __func__);
310 /* Created as LE */
311 *outbuf = rndis_driver_version;
312 retval = 0;
313 break;
314
315 /* mandatory */
316 case OID_GEN_CURRENT_PACKET_FILTER:
317 DBG("%s: OID_GEN_CURRENT_PACKET_FILTER\n", __func__);
318 *outbuf = cpu_to_le32 (*rndis_per_dev_params[configNr].filter);
319 retval = 0;
320 break;
321
322 /* mandatory */
323 case OID_GEN_MAXIMUM_TOTAL_SIZE:
324 DBG("%s: OID_GEN_MAXIMUM_TOTAL_SIZE\n", __func__);
325 *outbuf = __constant_cpu_to_le32(RNDIS_MAX_TOTAL_SIZE);
326 retval = 0;
327 break;
328
329 /* mandatory */
330 case OID_GEN_MEDIA_CONNECT_STATUS:
331 if (rndis_debug > 1)
332 DBG("%s: OID_GEN_MEDIA_CONNECT_STATUS\n", __func__);
333 *outbuf = cpu_to_le32 (rndis_per_dev_params [configNr]
334 .media_state);
335 retval = 0;
336 break;
337
338 case OID_GEN_PHYSICAL_MEDIUM:
339 DBG("%s: OID_GEN_PHYSICAL_MEDIUM\n", __func__);
340 *outbuf = __constant_cpu_to_le32 (0);
341 retval = 0;
342 break;
343
344 /* The RNDIS specification is incomplete/wrong. Some versions
345 * of MS-Windows expect OIDs that aren't specified there. Other
346 * versions emit undefined RNDIS messages. DOCUMENT ALL THESE!
347 */
348 case OID_GEN_MAC_OPTIONS: /* from WinME */
349 DBG("%s: OID_GEN_MAC_OPTIONS\n", __func__);
350 *outbuf = __constant_cpu_to_le32(
351 NDIS_MAC_OPTION_RECEIVE_SERIALIZED
352 | NDIS_MAC_OPTION_FULL_DUPLEX);
353 retval = 0;
354 break;
355
356 /* statistics OIDs (table 4-2) */
357
358 /* mandatory */
359 case OID_GEN_XMIT_OK:
360 if (rndis_debug > 1)
361 DBG("%s: OID_GEN_XMIT_OK\n", __func__);
362 if (stats) {
363 *outbuf = cpu_to_le32(stats->tx_packets
364 - stats->tx_errors - stats->tx_dropped);
365 retval = 0;
366 }
367 break;
368
369 /* mandatory */
370 case OID_GEN_RCV_OK:
371 if (rndis_debug > 1)
372 DBG("%s: OID_GEN_RCV_OK\n", __func__);
373 if (stats) {
374 *outbuf = cpu_to_le32(stats->rx_packets
375 - stats->rx_errors - stats->rx_dropped);
376 retval = 0;
377 }
378 break;
379
380 /* mandatory */
381 case OID_GEN_XMIT_ERROR:
382 if (rndis_debug > 1)
383 DBG("%s: OID_GEN_XMIT_ERROR\n", __func__);
384 if (stats) {
385 *outbuf = cpu_to_le32(stats->tx_errors);
386 retval = 0;
387 }
388 break;
389
390 /* mandatory */
391 case OID_GEN_RCV_ERROR:
392 if (rndis_debug > 1)
393 DBG("%s: OID_GEN_RCV_ERROR\n", __func__);
394 if (stats) {
395 *outbuf = cpu_to_le32(stats->rx_errors);
396 retval = 0;
397 }
398 break;
399
400 /* mandatory */
401 case OID_GEN_RCV_NO_BUFFER:
402 DBG("%s: OID_GEN_RCV_NO_BUFFER\n", __func__);
403 if (stats) {
404 *outbuf = cpu_to_le32(stats->rx_dropped);
405 retval = 0;
406 }
407 break;
408
409 /* ieee802.3 OIDs (table 4-3) */
410
411 /* mandatory */
412 case OID_802_3_PERMANENT_ADDRESS:
413 DBG("%s: OID_802_3_PERMANENT_ADDRESS\n", __func__);
414 if (rndis_per_dev_params [configNr].dev) {
415 length = ETH_ALEN;
416 memcpy (outbuf,
417 rndis_per_dev_params [configNr].host_mac,
418 length);
419 retval = 0;
420 }
421 break;
422
423 /* mandatory */
424 case OID_802_3_CURRENT_ADDRESS:
425 DBG("%s: OID_802_3_CURRENT_ADDRESS\n", __func__);
426 if (rndis_per_dev_params [configNr].dev) {
427 length = ETH_ALEN;
428 memcpy (outbuf,
429 rndis_per_dev_params [configNr].host_mac,
430 length);
431 retval = 0;
432 }
433 break;
434
435 /* mandatory */
436 case OID_802_3_MULTICAST_LIST:
437 DBG("%s: OID_802_3_MULTICAST_LIST\n", __func__);
438 /* Multicast base address only */
439 *outbuf = __constant_cpu_to_le32 (0xE0000000);
440 retval = 0;
441 break;
442
443 /* mandatory */
444 case OID_802_3_MAXIMUM_LIST_SIZE:
445 DBG("%s: OID_802_3_MAXIMUM_LIST_SIZE\n", __func__);
446 /* Multicast base address only */
447 *outbuf = __constant_cpu_to_le32 (1);
448 retval = 0;
449 break;
450
451 case OID_802_3_MAC_OPTIONS:
452 DBG("%s: OID_802_3_MAC_OPTIONS\n", __func__);
453 break;
454
455 /* ieee802.3 statistics OIDs (table 4-4) */
456
457 /* mandatory */
458 case OID_802_3_RCV_ERROR_ALIGNMENT:
459 DBG("%s: OID_802_3_RCV_ERROR_ALIGNMENT\n", __func__);
460 if (stats) {
461 *outbuf = cpu_to_le32(stats->rx_frame_errors);
462 retval = 0;
463 }
464 break;
465
466 /* mandatory */
467 case OID_802_3_XMIT_ONE_COLLISION:
468 DBG("%s: OID_802_3_XMIT_ONE_COLLISION\n", __func__);
469 *outbuf = __constant_cpu_to_le32 (0);
470 retval = 0;
471 break;
472
473 /* mandatory */
474 case OID_802_3_XMIT_MORE_COLLISIONS:
475 DBG("%s: OID_802_3_XMIT_MORE_COLLISIONS\n", __func__);
476 *outbuf = __constant_cpu_to_le32 (0);
477 retval = 0;
478 break;
479
480 default:
481 pr_warning("%s: query unknown OID 0x%08X\n",
482 __func__, OID);
483 }
484 if (retval < 0)
485 length = 0;
486
487 resp->InformationBufferLength = cpu_to_le32 (length);
488 r->length = length + sizeof *resp;
489 resp->MessageLength = cpu_to_le32 (r->length);
490 return retval;
491 }
492
493 static int gen_ndis_set_resp (u8 configNr, u32 OID, u8 *buf, u32 buf_len,
494 rndis_resp_t *r)
495 {
496 rndis_set_cmplt_type *resp;
497 int i, retval = -ENOTSUPP;
498 struct rndis_params *params;
499
500 if (!r)
501 return -ENOMEM;
502 resp = (rndis_set_cmplt_type *) r->buf;
503 if (!resp)
504 return -ENOMEM;
505
506 if (buf_len && rndis_debug > 1) {
507 DBG("set OID %08x value, len %d:\n", OID, buf_len);
508 for (i = 0; i < buf_len; i += 16) {
509 DBG("%03d: %08x %08x %08x %08x\n", i,
510 get_unaligned_le32(&buf[i]),
511 get_unaligned_le32(&buf[i + 4]),
512 get_unaligned_le32(&buf[i + 8]),
513 get_unaligned_le32(&buf[i + 12]));
514 }
515 }
516
517 params = &rndis_per_dev_params [configNr];
518 switch (OID) {
519 case OID_GEN_CURRENT_PACKET_FILTER:
520
521 /* these NDIS_PACKET_TYPE_* bitflags are shared with
522 * cdc_filter; it's not RNDIS-specific
523 * NDIS_PACKET_TYPE_x == USB_CDC_PACKET_TYPE_x for x in:
524 * PROMISCUOUS, DIRECTED,
525 * MULTICAST, ALL_MULTICAST, BROADCAST
526 */
527 *params->filter = (u16)get_unaligned_le32(buf);
528 DBG("%s: OID_GEN_CURRENT_PACKET_FILTER %08x\n",
529 __func__, *params->filter);
530
531 /* this call has a significant side effect: it's
532 * what makes the packet flow start and stop, like
533 * activating the CDC Ethernet altsetting.
534 */
535 retval = 0;
536 if (*params->filter) {
537 params->state = RNDIS_DATA_INITIALIZED;
538 netif_carrier_on(params->dev);
539 if (netif_running(params->dev))
540 netif_wake_queue (params->dev);
541 } else {
542 params->state = RNDIS_INITIALIZED;
543 netif_carrier_off (params->dev);
544 netif_stop_queue (params->dev);
545 }
546 break;
547
548 case OID_802_3_MULTICAST_LIST:
549 /* I think we can ignore this */
550 DBG("%s: OID_802_3_MULTICAST_LIST\n", __func__);
551 retval = 0;
552 break;
553
554 default:
555 pr_warning("%s: set unknown OID 0x%08X, size %d\n",
556 __func__, OID, buf_len);
557 }
558
559 return retval;
560 }
561
562 /*
563 * Response Functions
564 */
565
566 static int rndis_init_response (int configNr, rndis_init_msg_type *buf)
567 {
568 rndis_init_cmplt_type *resp;
569 rndis_resp_t *r;
570 struct rndis_params *params = rndis_per_dev_params + configNr;
571
572 if (!params->dev)
573 return -ENOTSUPP;
574
575 r = rndis_add_response (configNr, sizeof (rndis_init_cmplt_type));
576 if (!r)
577 return -ENOMEM;
578 resp = (rndis_init_cmplt_type *) r->buf;
579
580 resp->MessageType = __constant_cpu_to_le32 (
581 REMOTE_NDIS_INITIALIZE_CMPLT);
582 resp->MessageLength = __constant_cpu_to_le32 (52);
583 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
584 resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
585 resp->MajorVersion = __constant_cpu_to_le32 (RNDIS_MAJOR_VERSION);
586 resp->MinorVersion = __constant_cpu_to_le32 (RNDIS_MINOR_VERSION);
587 resp->DeviceFlags = __constant_cpu_to_le32 (RNDIS_DF_CONNECTIONLESS);
588 resp->Medium = __constant_cpu_to_le32 (RNDIS_MEDIUM_802_3);
589 resp->MaxPacketsPerTransfer = __constant_cpu_to_le32 (1);
590 resp->MaxTransferSize = cpu_to_le32 (
591 params->dev->mtu
592 + sizeof (struct ethhdr)
593 + sizeof (struct rndis_packet_msg_type)
594 + 22);
595 resp->PacketAlignmentFactor = __constant_cpu_to_le32 (0);
596 resp->AFListOffset = __constant_cpu_to_le32 (0);
597 resp->AFListSize = __constant_cpu_to_le32 (0);
598
599 params->resp_avail(params->v);
600 return 0;
601 }
602
603 static int rndis_query_response (int configNr, rndis_query_msg_type *buf)
604 {
605 rndis_query_cmplt_type *resp;
606 rndis_resp_t *r;
607 struct rndis_params *params = rndis_per_dev_params + configNr;
608
609 // DBG("%s: OID = %08X\n", __func__, cpu_to_le32(buf->OID));
610 if (!params->dev)
611 return -ENOTSUPP;
612
613 /*
614 * we need more memory:
615 * gen_ndis_query_resp expects enough space for
616 * rndis_query_cmplt_type followed by data.
617 * oid_supported_list is the largest data reply
618 */
619 r = rndis_add_response (configNr,
620 sizeof (oid_supported_list) + sizeof(rndis_query_cmplt_type));
621 if (!r)
622 return -ENOMEM;
623 resp = (rndis_query_cmplt_type *) r->buf;
624
625 resp->MessageType = __constant_cpu_to_le32 (REMOTE_NDIS_QUERY_CMPLT);
626 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
627
628 if (gen_ndis_query_resp (configNr, le32_to_cpu (buf->OID),
629 le32_to_cpu(buf->InformationBufferOffset)
630 + 8 + (u8 *) buf,
631 le32_to_cpu(buf->InformationBufferLength),
632 r)) {
633 /* OID not supported */
634 resp->Status = __constant_cpu_to_le32 (
635 RNDIS_STATUS_NOT_SUPPORTED);
636 resp->MessageLength = __constant_cpu_to_le32 (sizeof *resp);
637 resp->InformationBufferLength = __constant_cpu_to_le32 (0);
638 resp->InformationBufferOffset = __constant_cpu_to_le32 (0);
639 } else
640 resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
641
642 params->resp_avail(params->v);
643 return 0;
644 }
645
646 static int rndis_set_response (int configNr, rndis_set_msg_type *buf)
647 {
648 u32 BufLength, BufOffset;
649 rndis_set_cmplt_type *resp;
650 rndis_resp_t *r;
651 struct rndis_params *params = rndis_per_dev_params + configNr;
652
653 r = rndis_add_response (configNr, sizeof (rndis_set_cmplt_type));
654 if (!r)
655 return -ENOMEM;
656 resp = (rndis_set_cmplt_type *) r->buf;
657
658 BufLength = le32_to_cpu (buf->InformationBufferLength);
659 BufOffset = le32_to_cpu (buf->InformationBufferOffset);
660
661 #ifdef VERBOSE_DEBUG
662 DBG("%s: Length: %d\n", __func__, BufLength);
663 DBG("%s: Offset: %d\n", __func__, BufOffset);
664 DBG("%s: InfoBuffer: ", __func__);
665
666 for (i = 0; i < BufLength; i++) {
667 DBG("%02x ", *(((u8 *) buf) + i + 8 + BufOffset));
668 }
669
670 DBG("\n");
671 #endif
672
673 resp->MessageType = __constant_cpu_to_le32 (REMOTE_NDIS_SET_CMPLT);
674 resp->MessageLength = __constant_cpu_to_le32 (16);
675 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
676 if (gen_ndis_set_resp (configNr, le32_to_cpu (buf->OID),
677 ((u8 *) buf) + 8 + BufOffset, BufLength, r))
678 resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_NOT_SUPPORTED);
679 else
680 resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
681
682 params->resp_avail(params->v);
683 return 0;
684 }
685
686 static int rndis_reset_response (int configNr, rndis_reset_msg_type *buf)
687 {
688 rndis_reset_cmplt_type *resp;
689 rndis_resp_t *r;
690 struct rndis_params *params = rndis_per_dev_params + configNr;
691
692 r = rndis_add_response (configNr, sizeof (rndis_reset_cmplt_type));
693 if (!r)
694 return -ENOMEM;
695 resp = (rndis_reset_cmplt_type *) r->buf;
696
697 resp->MessageType = __constant_cpu_to_le32 (REMOTE_NDIS_RESET_CMPLT);
698 resp->MessageLength = __constant_cpu_to_le32 (16);
699 resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
700 /* resent information */
701 resp->AddressingReset = __constant_cpu_to_le32 (1);
702
703 params->resp_avail(params->v);
704 return 0;
705 }
706
707 static int rndis_keepalive_response (int configNr,
708 rndis_keepalive_msg_type *buf)
709 {
710 rndis_keepalive_cmplt_type *resp;
711 rndis_resp_t *r;
712 struct rndis_params *params = rndis_per_dev_params + configNr;
713
714 /* host "should" check only in RNDIS_DATA_INITIALIZED state */
715
716 r = rndis_add_response (configNr, sizeof (rndis_keepalive_cmplt_type));
717 if (!r)
718 return -ENOMEM;
719 resp = (rndis_keepalive_cmplt_type *) r->buf;
720
721 resp->MessageType = __constant_cpu_to_le32 (
722 REMOTE_NDIS_KEEPALIVE_CMPLT);
723 resp->MessageLength = __constant_cpu_to_le32 (16);
724 resp->RequestID = buf->RequestID; /* Still LE in msg buffer */
725 resp->Status = __constant_cpu_to_le32 (RNDIS_STATUS_SUCCESS);
726
727 params->resp_avail(params->v);
728 return 0;
729 }
730
731
732 /*
733 * Device to Host Comunication
734 */
735 static int rndis_indicate_status_msg (int configNr, u32 status)
736 {
737 rndis_indicate_status_msg_type *resp;
738 rndis_resp_t *r;
739 struct rndis_params *params = rndis_per_dev_params + configNr;
740
741 if (params->state == RNDIS_UNINITIALIZED)
742 return -ENOTSUPP;
743
744 r = rndis_add_response (configNr,
745 sizeof (rndis_indicate_status_msg_type));
746 if (!r)
747 return -ENOMEM;
748 resp = (rndis_indicate_status_msg_type *) r->buf;
749
750 resp->MessageType = __constant_cpu_to_le32 (
751 REMOTE_NDIS_INDICATE_STATUS_MSG);
752 resp->MessageLength = __constant_cpu_to_le32 (20);
753 resp->Status = cpu_to_le32 (status);
754 resp->StatusBufferLength = __constant_cpu_to_le32 (0);
755 resp->StatusBufferOffset = __constant_cpu_to_le32 (0);
756
757 params->resp_avail(params->v);
758 return 0;
759 }
760
761 int rndis_signal_connect (int configNr)
762 {
763 rndis_per_dev_params [configNr].media_state
764 = NDIS_MEDIA_STATE_CONNECTED;
765 return rndis_indicate_status_msg (configNr,
766 RNDIS_STATUS_MEDIA_CONNECT);
767 }
768
769 int rndis_signal_disconnect (int configNr)
770 {
771 rndis_per_dev_params [configNr].media_state
772 = NDIS_MEDIA_STATE_DISCONNECTED;
773 return rndis_indicate_status_msg (configNr,
774 RNDIS_STATUS_MEDIA_DISCONNECT);
775 }
776
777 void rndis_uninit (int configNr)
778 {
779 u8 *buf;
780 u32 length;
781
782 if (configNr >= RNDIS_MAX_CONFIGS)
783 return;
784 rndis_per_dev_params [configNr].state = RNDIS_UNINITIALIZED;
785
786 /* drain the response queue */
787 while ((buf = rndis_get_next_response(configNr, &length)))
788 rndis_free_response(configNr, buf);
789 }
790
791 void rndis_set_host_mac (int configNr, const u8 *addr)
792 {
793 rndis_per_dev_params [configNr].host_mac = addr;
794 }
795
796 /*
797 * Message Parser
798 */
799 int rndis_msg_parser (u8 configNr, u8 *buf)
800 {
801 u32 MsgType, MsgLength;
802 __le32 *tmp;
803 struct rndis_params *params;
804
805 if (!buf)
806 return -ENOMEM;
807
808 tmp = (__le32 *) buf;
809 MsgType = get_unaligned_le32(tmp++);
810 MsgLength = get_unaligned_le32(tmp++);
811
812 if (configNr >= RNDIS_MAX_CONFIGS)
813 return -ENOTSUPP;
814 params = &rndis_per_dev_params [configNr];
815
816 /* NOTE: RNDIS is *EXTREMELY* chatty ... Windows constantly polls for
817 * rx/tx statistics and link status, in addition to KEEPALIVE traffic
818 * and normal HC level polling to see if there's any IN traffic.
819 */
820
821 /* For USB: responses may take up to 10 seconds */
822 switch (MsgType) {
823 case REMOTE_NDIS_INITIALIZE_MSG:
824 DBG("%s: REMOTE_NDIS_INITIALIZE_MSG\n",
825 __func__ );
826 params->state = RNDIS_INITIALIZED;
827 return rndis_init_response (configNr,
828 (rndis_init_msg_type *) buf);
829
830 case REMOTE_NDIS_HALT_MSG:
831 DBG("%s: REMOTE_NDIS_HALT_MSG\n",
832 __func__ );
833 params->state = RNDIS_UNINITIALIZED;
834 if (params->dev) {
835 netif_carrier_off (params->dev);
836 netif_stop_queue (params->dev);
837 }
838 return 0;
839
840 case REMOTE_NDIS_QUERY_MSG:
841 return rndis_query_response (configNr,
842 (rndis_query_msg_type *) buf);
843
844 case REMOTE_NDIS_SET_MSG:
845 return rndis_set_response (configNr,
846 (rndis_set_msg_type *) buf);
847
848 case REMOTE_NDIS_RESET_MSG:
849 DBG("%s: REMOTE_NDIS_RESET_MSG\n",
850 __func__ );
851 return rndis_reset_response (configNr,
852 (rndis_reset_msg_type *) buf);
853
854 case REMOTE_NDIS_KEEPALIVE_MSG:
855 /* For USB: host does this every 5 seconds */
856 if (rndis_debug > 1)
857 DBG("%s: REMOTE_NDIS_KEEPALIVE_MSG\n",
858 __func__ );
859 return rndis_keepalive_response (configNr,
860 (rndis_keepalive_msg_type *)
861 buf);
862
863 default:
864 /* At least Windows XP emits some undefined RNDIS messages.
865 * In one case those messages seemed to relate to the host
866 * suspending itself.
867 */
868 pr_warning("%s: unknown RNDIS message 0x%08X len %d\n",
869 __func__ , MsgType, MsgLength);
870 {
871 unsigned i;
872 for (i = 0; i < MsgLength; i += 16) {
873 DBG("%03d: "
874 " %02x %02x %02x %02x"
875 " %02x %02x %02x %02x"
876 " %02x %02x %02x %02x"
877 " %02x %02x %02x %02x"
878 "\n",
879 i,
880 buf[i], buf [i+1],
881 buf[i+2], buf[i+3],
882 buf[i+4], buf [i+5],
883 buf[i+6], buf[i+7],
884 buf[i+8], buf [i+9],
885 buf[i+10], buf[i+11],
886 buf[i+12], buf [i+13],
887 buf[i+14], buf[i+15]);
888 }
889 }
890 break;
891 }
892
893 return -ENOTSUPP;
894 }
895
896 int rndis_register(void (*resp_avail)(void *v), void *v)
897 {
898 u8 i;
899
900 if (!resp_avail)
901 return -EINVAL;
902
903 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
904 if (!rndis_per_dev_params [i].used) {
905 rndis_per_dev_params [i].used = 1;
906 rndis_per_dev_params [i].resp_avail = resp_avail;
907 rndis_per_dev_params [i].v = v;
908 DBG("%s: configNr = %d\n", __func__, i);
909 return i;
910 }
911 }
912 DBG("failed\n");
913
914 return -ENODEV;
915 }
916
917 void rndis_deregister (int configNr)
918 {
919 DBG("%s: \n", __func__ );
920
921 if (configNr >= RNDIS_MAX_CONFIGS) return;
922 rndis_per_dev_params [configNr].used = 0;
923
924 return;
925 }
926
927 int rndis_set_param_dev(u8 configNr, struct net_device *dev, u16 *cdc_filter)
928 {
929 DBG("%s:\n", __func__ );
930 if (!dev)
931 return -EINVAL;
932 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
933
934 rndis_per_dev_params [configNr].dev = dev;
935 rndis_per_dev_params [configNr].filter = cdc_filter;
936
937 return 0;
938 }
939
940 int rndis_set_param_vendor (u8 configNr, u32 vendorID, const char *vendorDescr)
941 {
942 DBG("%s:\n", __func__ );
943 if (!vendorDescr) return -1;
944 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
945
946 rndis_per_dev_params [configNr].vendorID = vendorID;
947 rndis_per_dev_params [configNr].vendorDescr = vendorDescr;
948
949 return 0;
950 }
951
952 int rndis_set_param_medium (u8 configNr, u32 medium, u32 speed)
953 {
954 DBG("%s: %u %u\n", __func__, medium, speed);
955 if (configNr >= RNDIS_MAX_CONFIGS) return -1;
956
957 rndis_per_dev_params [configNr].medium = medium;
958 rndis_per_dev_params [configNr].speed = speed;
959
960 return 0;
961 }
962
963 void rndis_add_hdr (struct sk_buff *skb)
964 {
965 struct rndis_packet_msg_type *header;
966
967 if (!skb)
968 return;
969 header = (void *) skb_push (skb, sizeof *header);
970 memset (header, 0, sizeof *header);
971 header->MessageType = __constant_cpu_to_le32(REMOTE_NDIS_PACKET_MSG);
972 header->MessageLength = cpu_to_le32(skb->len);
973 header->DataOffset = __constant_cpu_to_le32 (36);
974 header->DataLength = cpu_to_le32(skb->len - sizeof *header);
975 }
976
977 void rndis_free_response (int configNr, u8 *buf)
978 {
979 rndis_resp_t *r;
980 struct list_head *act, *tmp;
981
982 list_for_each_safe (act, tmp,
983 &(rndis_per_dev_params [configNr].resp_queue))
984 {
985 r = list_entry (act, rndis_resp_t, list);
986 if (r && r->buf == buf) {
987 list_del (&r->list);
988 kfree (r);
989 }
990 }
991 }
992
993 u8 *rndis_get_next_response (int configNr, u32 *length)
994 {
995 rndis_resp_t *r;
996 struct list_head *act, *tmp;
997
998 if (!length) return NULL;
999
1000 list_for_each_safe (act, tmp,
1001 &(rndis_per_dev_params [configNr].resp_queue))
1002 {
1003 r = list_entry (act, rndis_resp_t, list);
1004 if (!r->send) {
1005 r->send = 1;
1006 *length = r->length;
1007 return r->buf;
1008 }
1009 }
1010
1011 return NULL;
1012 }
1013
1014 static rndis_resp_t *rndis_add_response (int configNr, u32 length)
1015 {
1016 rndis_resp_t *r;
1017
1018 /* NOTE: this gets copied into ether.c USB_BUFSIZ bytes ... */
1019 r = kmalloc (sizeof (rndis_resp_t) + length, GFP_ATOMIC);
1020 if (!r) return NULL;
1021
1022 r->buf = (u8 *) (r + 1);
1023 r->length = length;
1024 r->send = 0;
1025
1026 list_add_tail (&r->list,
1027 &(rndis_per_dev_params [configNr].resp_queue));
1028 return r;
1029 }
1030
1031 int rndis_rm_hdr(struct sk_buff *skb)
1032 {
1033 /* tmp points to a struct rndis_packet_msg_type */
1034 __le32 *tmp = (void *) skb->data;
1035
1036 /* MessageType, MessageLength */
1037 if (__constant_cpu_to_le32(REMOTE_NDIS_PACKET_MSG)
1038 != get_unaligned(tmp++))
1039 return -EINVAL;
1040 tmp++;
1041
1042 /* DataOffset, DataLength */
1043 if (!skb_pull(skb, get_unaligned_le32(tmp++) + 8))
1044 return -EOVERFLOW;
1045 skb_trim(skb, get_unaligned_le32(tmp++));
1046
1047 return 0;
1048 }
1049
1050 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1051
1052 static int rndis_proc_show(struct seq_file *m, void *v)
1053 {
1054 rndis_params *param = m->private;
1055
1056 seq_printf(m,
1057 "Config Nr. %d\n"
1058 "used : %s\n"
1059 "state : %s\n"
1060 "medium : 0x%08X\n"
1061 "speed : %d\n"
1062 "cable : %s\n"
1063 "vendor ID : 0x%08X\n"
1064 "vendor : %s\n",
1065 param->confignr, (param->used) ? "y" : "n",
1066 ({ char *s = "?";
1067 switch (param->state) {
1068 case RNDIS_UNINITIALIZED:
1069 s = "RNDIS_UNINITIALIZED"; break;
1070 case RNDIS_INITIALIZED:
1071 s = "RNDIS_INITIALIZED"; break;
1072 case RNDIS_DATA_INITIALIZED:
1073 s = "RNDIS_DATA_INITIALIZED"; break;
1074 }; s; }),
1075 param->medium,
1076 (param->media_state) ? 0 : param->speed*100,
1077 (param->media_state) ? "disconnected" : "connected",
1078 param->vendorID, param->vendorDescr);
1079 return 0;
1080 }
1081
1082 static ssize_t rndis_proc_write(struct file *file, const char __user *buffer,
1083 size_t count, loff_t *ppos)
1084 {
1085 rndis_params *p = PDE(file->f_path.dentry->d_inode)->data;
1086 u32 speed = 0;
1087 int i, fl_speed = 0;
1088
1089 for (i = 0; i < count; i++) {
1090 char c;
1091 if (get_user(c, buffer))
1092 return -EFAULT;
1093 switch (c) {
1094 case '0':
1095 case '1':
1096 case '2':
1097 case '3':
1098 case '4':
1099 case '5':
1100 case '6':
1101 case '7':
1102 case '8':
1103 case '9':
1104 fl_speed = 1;
1105 speed = speed*10 + c - '0';
1106 break;
1107 case 'C':
1108 case 'c':
1109 rndis_signal_connect (p->confignr);
1110 break;
1111 case 'D':
1112 case 'd':
1113 rndis_signal_disconnect(p->confignr);
1114 break;
1115 default:
1116 if (fl_speed) p->speed = speed;
1117 else DBG("%c is not valid\n", c);
1118 break;
1119 }
1120
1121 buffer++;
1122 }
1123
1124 return count;
1125 }
1126
1127 static int rndis_proc_open(struct inode *inode, struct file *file)
1128 {
1129 return single_open(file, rndis_proc_show, PDE(inode)->data);
1130 }
1131
1132 static const struct file_operations rndis_proc_fops = {
1133 .owner = THIS_MODULE,
1134 .open = rndis_proc_open,
1135 .read = seq_read,
1136 .llseek = seq_lseek,
1137 .release = single_release,
1138 .write = rndis_proc_write,
1139 };
1140
1141 #define NAME_TEMPLATE "driver/rndis-%03d"
1142
1143 static struct proc_dir_entry *rndis_connect_state [RNDIS_MAX_CONFIGS];
1144
1145 #endif /* CONFIG_USB_GADGET_DEBUG_FILES */
1146
1147
1148 int __init rndis_init (void)
1149 {
1150 u8 i;
1151
1152 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
1153 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1154 char name [20];
1155
1156 sprintf (name, NAME_TEMPLATE, i);
1157 if (!(rndis_connect_state [i]
1158 = proc_create_data(name, 0660, NULL,
1159 &rndis_proc_fops,
1160 (void *)(rndis_per_dev_params + i))))
1161 {
1162 DBG("%s :remove entries", __func__);
1163 while (i) {
1164 sprintf (name, NAME_TEMPLATE, --i);
1165 remove_proc_entry (name, NULL);
1166 }
1167 DBG("\n");
1168 return -EIO;
1169 }
1170 #endif
1171 rndis_per_dev_params [i].confignr = i;
1172 rndis_per_dev_params [i].used = 0;
1173 rndis_per_dev_params [i].state = RNDIS_UNINITIALIZED;
1174 rndis_per_dev_params [i].media_state
1175 = NDIS_MEDIA_STATE_DISCONNECTED;
1176 INIT_LIST_HEAD (&(rndis_per_dev_params [i].resp_queue));
1177 }
1178
1179 return 0;
1180 }
1181
1182 void rndis_exit (void)
1183 {
1184 #ifdef CONFIG_USB_GADGET_DEBUG_FILES
1185 u8 i;
1186 char name [20];
1187
1188 for (i = 0; i < RNDIS_MAX_CONFIGS; i++) {
1189 sprintf (name, NAME_TEMPLATE, i);
1190 remove_proc_entry (name, NULL);
1191 }
1192 #endif
1193 }
1194
kernel-based virtual machine